Heinbich ostermanx and axel peip



UNITED STATES PA'rnN'r price.

HEINRICH OS'IERMANX AND AXEL PRIP, OF GENEVA, S\VITZERLAND.

METALLIC ALLOY.

SPECIFICATION forming part of Letters Patent No. 381,718, dated April 24:, 1888.

Application filed February 16, 1888.

To all whom it may concern:

Be it known that we, HEINRICH Os'rnn- MANN, chemist, and AXEL PRIP, jeweler, both residing at Geneva, Switzerland, have invented aE-Ietallic Alloy, of which the following is a specification.

Our invention relates to a metallic alloy intended to be used instead of steel in such mechanism in which the working parts are to be prevented from being magnetized by external influences like those of dynamo-electric mar chines. This is peculiarly valuable with regerd to watch mechanism, and especially in the different parts of watch-escapenlents.

The principal conditions to which such an alloy must conform are the following: It must be composed only of metals which melted together have the property of not being meg netizable and are entirely free from any influence of magnetism, and be ductile, malleable, and easily rolled. Its hardness and its coefli cient of linear expansion must be as nearly as possible the same as that of steel. To answer that purpose we have invented the following alloy or combination of metals, for which we now claim a patent:

Serial No. 264,251. (N0 specimens.)

()nr alloy is composed of platinum, forty to fifty parts; copper, fifteen to twenty-five parts; nickel, twentyfive to thirty-five parts; Wolfram, one to two parts; cobalt, one to two 30 parts, and cadmium, one to two and a half parts.

Having claini-- v An alloy composed of platinum, forty to fifty 35 parts; copper, fifteen to twenty-five parts; nickel, twenty-five to thirty-five parts; wolfram, oneto two parts; cobalt, one to two parts, and cadmium, one to two and a half parts, substantially as described, and for the purpose n specifier.

In testimony whereof we have signed our namrs to this specification in the presence of two subscribing witnesses.

HEINRICH OSTERMANN. AXEL PRIP.

thus described our invention, we

Witnesses:

L. T. ADAMS, E. IMER-ScHNEIDER. 

